Error with Room Cycle

[Helpi]

Description: Sometimes happens this error on Arcturus console, idk how/when/why appears, but yeah, i think is important!

Code:

java.util.ConcurrentModificationException
    at gnu.trove.impl.hash.THashPrimitiveIterator.nextIndex(THashPrimitiveIterator.java:83)
    at gnu.trove.impl.hash.THashPrimitiveIterator.moveToNextIndex(THashPrimitiveIterator.java:137)
    at gnu.trove.map.hash.TIntObjectHashMap$TIntObjectHashIterator.advance(TIntObjectHashMap.java:937)
    at com.eu.habbo.habbohotel.rooms.Room.cycle(Room.java:1691)
    at com.eu.habbo.habbohotel.rooms.Room.access$000(Room.java:77)
    at com.eu.habbo.habbohotel.rooms.Room$3.run(Room.java:1168)
    at com.eu.habbo.threading.ThreadPooling$1.run(ThreadPooling.java:52)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
    at java.lang.Thread.run(Thread.java:748)

[Wesley]

Removing version: 1.11.0 (automated comment)